I must have missed that example Ed and I'm sorry, but I did say this earlier and I'll repeat it here. Scientists in a lab have effectively slowed down and even stopped light. With that being said, there is no way to accurately assume the speed of light is a constant around the universe. Light could be slowing down or speeding up, or for all we know even stopped in the universe. It's fact that speed of light can be manipulated, so to assume it stays constant is only an assumption at best.

Half a statement? The speed of light is constant in a VACUUM.
A photon of light takes 3000 years to get from the center of the sun to the chromosphere, then 8 minutes 14 seconds to get from the chromosphere to planet earth.
Speed of light is affected by the medium it is travelling through (glass, water ....) and by gravitational force.
Your ignorance of even basic science is profound.

Yes, light speed can be manipulated...by passing it through different substances, like Glass, water, air, Ect. That is why when you stick a straw into a glass of water, the straw appears to have jumped and is in two parts; the light is traveling at two different speeds.

Now, in a vacuum, the speed is constant, because there is nothing to get in the way of the light. So it is allowed to travel it's fastest; like a car down an empty freeway. So if we shine a light into your left ear, it will travel at about 3.0x10^8 m/s out your right ear.